1259321 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種色輪及其馬達，特別係關於一種用 於投影系統中之色輪及其馬達。 【先前技術】 才又影糸統依其原理可區分為液晶投影系統(Liquid Crystal Display，LCD)、單晶矽液晶投影系統(Liquid Crystal on Silicon，LCOS)、數位光源處理技術投影系統(Digital Light Processing，DLP)···等，而DLP由於具有高亮度、正 確的色調重現性、快速的反應時間、無雜訊以及輕薄短小 等優點，已成為目前新一代熱門的投影技術之一。 在DLP式投影系統中，係採用數位控制，並利用反射 光原理，將光源集光之後經由透鏡聚焦，再穿過具有彩色 濾光片之色輪後，投射至數位微鏡晶片（DigitalBACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color wheel and a motor thereof, and more particularly to a color wheel and a motor for use in a projection system. [Prior Art] According to its principle, it can be divided into liquid crystal display (LCD), liquid crystal on silicon (LCOS), digital light source processing technology projection system (Digital Light) Processing, DLP)···etc., DLP has become one of the new generation of popular projection technologies due to its high brightness, correct color reproducibility, fast response time, no noise, and light and short. In the DLP projection system, digital control is used, and the light source is collected by light, then focused by a lens, and then passed through a color wheel with a color filter, and then projected onto a digital micromirror wafer (Digital
MiCr〇-mirrorDevice ’ DMD)上。由於微鏡晶片上具有許 多微小的可動W ’經由_電極控财祕#傾斜角度 以及偏轉時間，再藉由切換光的反射方向由鏡独投射至 螢幕呈像。 請參照圖1 ’其顯示習知之色輪之剖面示意圖。在一 般習知=設計上’色輪i係由—馬達u、彩色渡光片Η、 以及-：片13組成，其中馬達n主要係由一馬達殼^ 一軸心蓋112、一定你起彳Qn l 板113以及一線圈114所組成。彩 色濾光片12先黏結於璟貼装 衣狀之盍片13上，再將蓋片13設 1259321 、;、，達11之軸心蓋112上，使得蓋月13之中心孔洞與 ^蓋I12上之突起相合，而蓋片13則與軸心蓋112之環 形平面^占結。其中彩色濾光片12通常係為-環形玻璃經 ^得幻所需要之顏色，或是為數個扇形玻璃經過鍵腐 後15而成之環形濾光月。如此，當馬達11轉動時，即 可π動蓋片13及彩色濾光片12旋轉。 再凊翏照圖2，其顯示習知用於色輪中之馬達之剖面 示意圖。在一般習知之設計上，定位板Η)上固設有一軸 ，而軸心蓋112内設有—軸承，當馬達η内 之線圈114通電時，將使馬達u内磁場發生有序的變化而 形成一轉動磁場，使馬達11之馬達殼111以及軸心蓋112 旋轉。 由於在投影系統中為使色彩完美呈現，色輪必須以高 速方疋轉，其轉速經常高達72〇〇rpm以上，因此馬達以及色 輪中各構件在組裝之可靠度與動平衡上之要求十分嚴 苛。例如，馬達或是色輪在高逮旋轉過程中產生不平衡現 象’極可能造成彩色濾光片脫落、色輪產生偏心震動、噪 音、構件不當之摩擦與磨損等問題，並使色輪與馬達壽命 減短。然而在上述之習知設計中，馬達殼係為一套筒，利 用軸心蓋配合形成一平面以設置彩色濾光片以及蓋片，並 無任何可對爲達或是色輪動平衡進行校正之設計。因此， 研發一種構造簡單、且可以進行動平衡校正之馬達及色輪 是目前重要的課題。 【發明内容】 1259321 有鑑於上述課題，本發明之目的為提供一種可進行動 平衡校正之馬達。 本發明之又一目的為提供一種構造簡單、且可進行動 平衡校正之色輪。 緣是，為達上述目的，本發明提供了一種馬達，其包 含一軸心、一轉子定位元件以及一馬達殼。其中，轴心係 垂直設置於轉子定位元件，馬達殼於軸心之方向係具有一 開口，轉子定位元件與軸心係設置於馬達殼内，且轉子定 位元件遮蓋開口俾使馬達殼與轉子定位元件係形成一凹 陷部。 為達上述目的，本發明更提供了一種色輪，其包含一 彩色濾光片以及一馬達。其中，馬達具有一軸心、一轉子 定位元件與一馬達殼，轴心係垂直設置於轉子定位元件， 馬達殼於軸心方向係具有一開口，轉子定位元件與轴心係 設置於馬達殼内，且轉子定位元件遮蓋開口俾使馬達殼與 轉子定位元件係形成一凹陷部，而彩色濾光片係設置於馬 達形成有凹陷部之一表面上。 為達上述目的，本發明更提供了一種色輪，其包含一 彩色濾光片以及一馬達。其中，馬達具有一軸心與一馬達 殼，馬達殼於軸心方向具有一凹陷部，凹陷部具有與軸心 方向垂直之一底面，軸心係垂直設置於底面相對於馬達殼 内部之一侧上，而彩色濾光片係設置於馬達殼形成有凹陷 部之一表面上。 承上所述，因依本發明之色輪及其馬達之馬達殼具有 1259321 一開口，藉由轉子定位元件遮蓋此一開口可使得馬達殼與 轉子定位元件形成有一凹陷部，故此凹陷部能夠用以進行 轉動時之動平衡校正。進而言之，由於本發明之色輪及馬 達具有一凹陷部可進行動平衡校正，故當測試出色輪或馬 達具有不平衡之狀況時，可在凹陷部設置一重物使其達到 平衡，進而降低轉動時不平衡所造成之彩色濾光片脫落、 色輪產生偏心震動、噪音、構件不當之摩擦與磨損等問 題，使得色輪及馬達運轉更順暢並延長其使用壽命。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之色 輪及其馬達，其中相同的元件將以相同的參照符號加以說 明。 請參照圖3所示，其顯示本發明之較佳實施例之馬達 剖面示意圖。依本發明之較佳實施例之馬達21主要包含 一馬達殼211、一轉子定位元件212以及一轴心213。其 中，軸心213係垂直設置於轉子定位元件212上，馬達殼 211於軸心213之方向係具有一開口 2111，轉子定位元件 212與轴心213係設置於馬達殼211内，且轉子定位元件 212遮蓋住開口 2111，使得馬達殼211與轉子定位元件212 形成一凹陷部2112。當馬達21通電時，馬達21内之磁場 將發生有序的變化而形成一轉動磁場，使得軸心213以及 轉子定位元件212可帶動馬達殼211旋轉。另外，當馬達 21進行平衡測試發現有不平衡現象存在時，即可在凹陷部 1259321 2112中設置一重物30以進行動平衡校正。在本實施例中， 轉子定位元件212設置於馬達殼211内部時，其結合方式 係為緊配合，當然其結合方式亦可以為膠合或是娜合。 請參照圖4所示，其顯示本發明之另一較佳實施例之 馬達剖面示意圖。依本發明之另一較佳實施例之馬達31 主要包含一馬達殼311、一轉子定位元件312以及一轴心 313。其中，軸心313係垂直設置於轉子定位元件312上， 馬達殼311於軸心313之方向係具有一開口 3111，轉子定 位元件312與軸心313係設置於馬達殼311内，且轉子定 位元件312遮蓋住開口 3111，使得馬達殼311與轉子定位 元件312係形成一凹陷部3112。當馬達31通電時，馬達 31内之磁場將發生有序的變化而形成一轉動磁場，使轴心 313以及轉子定位元件312可帶動馬達殼311旋轉。另外， 當馬達31進行平衡測試發現有不平衡現象存在時，亦可 在凹陷部3112中設置一重物30以進行動平衡校正。 在本實施例中，轉子定位元件312與前一較佳實施例 中之轉子定位元件212之形狀略有不同（請配合參照圖 3)，因此當轉子定位元件312設置於馬達殼311内部時， 其結合位置亦與圖3所示不同，在此其結合方式係為緊配 合，當然其結合方式亦可以為膠合或是鉚合，可依使用者 需求以及製作上之考量決定。 以下係本發明之色輪之較佳實施例，為使便於理解， 下述實施例中之元件符號係沿用與前一實施例中相同元 件之符號來說明。 1259321 請參照圖5所示，其顯示本發明之較佳實施例之色輪 剖面示意圖。於本實施例中，為方便說明，馬達之標號係 沿用前述較佳實施例之馬達標號。 依本發明之較佳實施例之色輪2包含一馬達21以及 一彩色濾光片22。其中，馬達21主要包含一馬達殼211、 一轉子定位元件212以及一軸心213。軸心213係垂直設 置於轉子定位元件212上，馬達殼211於轴心213之方向 係具有一開口 2111，轉子定位元件212與轴心213係設置 於馬達殼211内，且轉子定位元件212遮蓋開口 2111，使 得馬達殼211與轉子定位元件212係形成一凹陷部2112， 彩色濾光片22則係設置於馬達21形成有凹陷部2112之 一表面2113上，使得彩色濾光片22係與轉子定位元件212 平行。當馬達21通電時，軸心213以及轉子定位元件212 即可帶動馬達殼211以及其上之彩色濾光片22旋轉。當 色輪2進行平衡測試發現有不平衡現象存在時，即可在凹 陷部2112中設置一重物30以進行動平衡校正。 於本較佳實施例中，轉子定位元件212於馬達殼211 内部之結合方式係為緊配合，當然其亦可以為膠合或是鉚 合。其次，本實施例中之彩色濾光片22係為一環形彩色 濾光片，其係可在一環形透明板上利用鍍膜形成紅、綠、 藍等三色之多個區塊或是形成紅、綠、藍三色加上白色透 明區塊；當然其亦可以是由複數片類扇形區塊之玻璃板經 過鍍膜後再組合而成的環形彩色濾光片，而此環形彩色濾 光片之中心孔徑大小可依需求作調整。 11 1259321 當然，如圖6所示，本實施例之色輪2更可包含一蓋 片23，蓋片23係設置於彩色濾光片22上，使得彩色濾光 片22位於蓋片23與馬達21之間。如此，蓋片23可使得 彩色濾光片22與馬達21之結合更為緊密，亦可作為彩色 濾光片22設置於馬達21之表面2113時之一定位基準。 請參照圖7所示，其顯示本發明之另一較佳實施例之 色輪剖面示意圖。依本發明之另一較佳實施例之色輪3包 含一馬達31以及一彩色濾光片32。其中，馬達31主要包 含一馬達殼311、一轉子定位元件312以及一軸心313， 轴心313係垂直設置於轉子定位元件312上，馬達殼311 於轴心313之方向係具有一開口 3111，轉子定位元件312 與軸心313係設置於馬達殼311内，且轉子定位元件312 遮蓋開口 3111，使得馬達殼311與轉子定位元件312形成 一凹陷部3112,彩色濾光片32係設置於馬達31形成有凹 陷部3112之一表面3113上，使得彩色濾光片32係與轉子 定位元件312平行。當馬達31通電時，轴心313以及轉 子定位元件312可帶動馬達殼311以及其上之彩色濾光片 32旋轉。當色輪3進行平衡測試發現有不平衡現象存在 時，亦可在凹陷部3112中設置一重物30以進行動平衡校 正° 於本較佳實施例中，轉子定位元件312於馬達殼311 内部之結合方式係為緊配合，當然其亦可以為膠合或是鉚 合。其次，本實施例中之彩色濾光片32係為一環形彩色 濾光片，其係可在一環形透明板上利用鍍膜形成紅、綠、 12 1259321 藍等三色之多個區塊或是形成紅、綠、藍三色加上白色透 明區塊；當然其亦可以是由複數片類扇形區塊之玻璃板經 過鍍膜後再組合而成的環形彩色濾光片，而此環形彩色濾 光片之中心孔徑大小可依需求作調整。 當然，如圖8所示，本實施例之色輪3更可包含一蓋 片33，蓋片33係設置於彩色濾光片32上，使得彩色濾光 片32位於蓋片33與馬達31之間。如此，蓋片33可使得 彩色濾光片32與馬達31之結合更為緊密，亦可作為彩色 濾光片32設置於馬達31之表面3113時之一定位基準。 請參照圖9所示，其顯示本發明之再一較佳實施例之 色輪剖面示意圖。依本發明之再一較佳實施例之色輪4包 含一馬達41以及一彩色濾光片42。其中，馬達41主要係 由一馬達殼411與一轴心412組成，馬達殼411係一體成 型並於轴心412方向具有一凹陷部4111，凹陷部4111具 有與轴心412方向垂直之一底面4112,軸心412係垂直固 設於底面4112相對於馬達殼411内之一侧上，而彩色濾光 片42係設置於馬達殼411形成有凹陷部4111之一表面 4113上。當馬達41通電時，轴心412可帶動馬達殼411 以及其上之彩色濾光片42旋轉。當色輪4進行平衡測試 發現有不平衡現象存在時，亦可在凹陷部4111中設置一重 物30以進行動平衡校正。 於本較佳實施例中，彩色濾光片42係為一環形彩色 濾光片，其係可在一環形透明板上利用鍍膜形成紅、綠、 藍等三色之多個區塊或是形成紅、綠、藍三色加上白色透 13 1259321 明區塊；當然其亦可以是由複數片類扇形區塊之玻璃板經 過鍍膜後再組合而成的環形彩色濾光片，而此環形彩色濾 光片之中心孔徑大小可依需求作調整。 當然，如圖10所示，本實施例之色輪4更可包含一 蓋片43,蓋片43係設置於彩色濾光片42上，使得彩色濾 光片42位於蓋片43與馬達41之間。如此，蓋片43可使 得彩色濾光片42與馬達41之結合更為緊密，亦可作為彩 色濾光片42設置於馬達41之表面4113時之一定位基準。 承上所述，因依本發明之色輪及其馬達之馬達殼具有 一開口，藉由轉子定位元件遮蓋此一開口可使得馬達殼與 轉子定位元件形成一凹陷部，此凹陷部即可用以進行轉動 時之動平衡校正。當測試出色輪或馬達具有不平衡之狀況 時，可在凹陷部設置一重物使其達到平衡，進而降低轉動 時不平衡所造成之彩色濾光片脫落、色輪產生偏心震動、 噪音、構件不當之摩擦與磨損等問題，使得色輪及馬達運 轉更順暢並延長其使用壽命。更進一步而言，由於本發明 之色輪及其馬達不具有軸心蓋，故彩色濾光片之形狀可以 為中心孔徑大小不限之環形彩色濾光片；並且由於本發明 之色輪及其馬達具有一凹陷部，除可進行動平衡校正容置 校正重物之外，尚可填以膠材增加彩色濾光片與馬達殼間 之黏著強度，減少色輪轉動時彩色濾光片發生脫落之虞， 此一凹陷部亦可容置多餘之膠材，避免溢膠造成彩色濾光 片受到污染。如搭配蓋片，則可使彩色濾光片與馬達殼之 結合更加穩固，並且蓋片亦有協助彩色濾光片定位之功 14 1259321 能。因此，本發明之色輪及其馬達能夠提供更彈性的玻璃 組裝方法、動平衡校正所需之空間以及延長色輪與馬達使 用壽命。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為一示意圖，顯示習知色輪之剖面圖； 圖2為一示意圖，顯示習知色輪中之馬達之剖面圖； 圖3為一示意圖，顯示本發明之較佳實施例之馬達之 剖面圖； 圖4為一示意圖，顯示本發明之另一較佳實施例之馬 達之剖面圖； 圖5為一示意圖，顯示本發明之較佳實施例之色輪之 剖面圖； 圖6為一示意圖，顯示本發明之較佳實施例之另一色 輪之剖面圖； 圖7為一示意圖，顯示本發明之另一較佳實施例之色 輪之剖面圖； 圖8為一示意圖，顯示本發明之另一較佳實施例之另 一色輪之剖面圖； 圖9為一示意圖，顯示本發明之再一較佳實施例之色 輪之剖面圖；以及 15 1259321 圖ίο為一示意圖，顯示本發明之再一較佳實施例之 另一色輪之剖面圖。 元件符號說明： 1 色輪 11 馬達 111 馬達殼 112 轴心蓋 1121 軸承 113 定位板 1131 轴心 114 線圈 12 彩色濾光片 13 蓋片 2 色輪 21 馬達 211 馬達殼 2111 開口 2112 凹陷砻P 2113 表面 212 轉子定位元件 213 轴心 22 彩色濾光片 23 蓋片 16 1259321 30 重物 3 色輪 31 馬達 311 馬達殼 3111 開口 3112 凹陷部 3113 表面 312 轉子定位元件 313 轴心 32 彩色濾、光片 33 蓋片 4 色輪 41 馬達 411 馬達殼 4111 凹陷部 4112 底面 4113 表面 412 轴心 42 彩色濾光片 43 蓋片MiCr〇-mirrorDevice ’ DMD). Since the micromirror wafer has a lot of tiny movable W' via the _electrode control # tilt angle and the yaw time, the mirror is projected by the mirror to the screen image by the direction of the switching light. Please refer to FIG. 1 ' for a schematic cross-sectional view showing a conventional color wheel. In the conventional knowledge = design, the color wheel i is composed of a motor u, a color light film Η, and a -: sheet 13, wherein the motor n is mainly composed of a motor casing ^ an axial cover 112, and you must start The Qn l board 113 and a coil 114 are formed. The color filter 12 is first bonded to the 璟 璟 状 13 13 , , , , , , , , , 12 12 12 12 12 593 593 593 593 593 593 593 593 593 593 593 593 12 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖 盖The upper protrusions are combined, and the cover sheet 13 is engaged with the annular plane of the shaft cover 112. The color filter 12 is usually a color required for the ring glass to be illusory, or an annular filter moon formed by a plurality of fan-shaped glass after the key rot. Thus, when the motor 11 is rotated, the cover sheet 13 and the color filter 12 can be rotated. Referring again to Figure 2, there is shown a schematic cross-sectional view of a conventional motor for use in a color wheel. In the conventional design, the positioning plate is fixed with a shaft, and the shaft cover 112 is provided with a bearing. When the coil 114 in the motor η is energized, the magnetic field in the motor u will be changed in an orderly manner. A rotating magnetic field is formed to rotate the motor case 111 of the motor 11 and the shaft cover 112. In order to make the color perfect in the projection system, the color wheel must be rotated at a high speed, and its rotation speed is often as high as 72 rpm or more. Therefore, the reliability and dynamic balance of the assembly of the motor and the color wheel are very high. Strict. For example, the motor or the color wheel creates an imbalance during the high-speed rotation process, which may cause problems such as color filter peeling off, color wheel eccentric vibration, noise, improper friction and wear of the member, and the color wheel and motor. Life expectancy is reduced. However, in the above-mentioned conventional design, the motor casing is a sleeve, and the shaft cover is used to form a plane to set the color filter and the cover sheet, and there is no need to correct the balance or the color wheel balance. The design. Therefore, the development of a motor and a color wheel that are simple in construction and capable of performing dynamic balance correction is an important issue at present. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a motor that can perform dynamic balance correction. It is still another object of the present invention to provide a color wheel that is simple in construction and that can be dynamically balanced. In order to achieve the above object, the present invention provides a motor comprising a shaft center, a rotor positioning member and a motor housing. Wherein, the shaft center is vertically disposed on the rotor positioning component, the motor casing has an opening in the direction of the shaft center, the rotor positioning component and the shaft center are disposed in the motor casing, and the rotor positioning component covers the opening to position the motor casing and the rotor The component forms a recess. To achieve the above object, the present invention further provides a color wheel comprising a color filter and a motor. Wherein, the motor has a shaft center, a rotor positioning component and a motor casing, the shaft center is vertically disposed on the rotor positioning component, the motor casing has an opening in the axial direction, and the rotor positioning component and the shaft center are disposed in the motor casing And the rotor positioning element covers the opening 俾 to form a recessed portion of the motor casing and the rotor positioning component, and the color filter is disposed on a surface of the motor formed with the recessed portion. To achieve the above object, the present invention further provides a color wheel comprising a color filter and a motor. Wherein, the motor has an axial center and a motor casing, the motor casing has a concave portion in the axial direction, the concave portion has a bottom surface perpendicular to the axial direction, and the axial center is vertically disposed on one side of the bottom surface relative to the inner side of the motor casing The color filter is disposed on a surface of the motor casing formed with the recessed portion. According to the above aspect, the motor casing of the color wheel and the motor thereof according to the present invention has an opening of 1259321, and the opening of the opening by the rotor positioning member can form a recessed portion of the motor casing and the rotor positioning member, so that the recess can be used. For dynamic balance correction when turning. In other words, since the color wheel and the motor of the present invention have a recessed portion for dynamic balance correction, when testing an excellent wheel or the motor has an unbalanced condition, a weight can be placed in the recess to balance it, thereby reducing The color filter falling off due to unbalance during rotation, the eccentric vibration of the color wheel, the noise, the friction and wear of the components are improper, and the color wheel and motor operate more smoothly and prolong their service life. [Embodiment] Hereinafter, a color wheel and a motor thereof according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be denoted by the same reference numerals. Referring to Figure 3, there is shown a cross-sectional view of a motor of a preferred embodiment of the present invention. The motor 21 in accordance with a preferred embodiment of the present invention primarily includes a motor housing 211, a rotor positioning member 212, and a shaft center 213. The shaft 213 is vertically disposed on the rotor positioning member 212. The motor housing 211 has an opening 2111 in the direction of the shaft 213. The rotor positioning member 212 and the shaft 213 are disposed in the motor housing 211, and the rotor positioning member is disposed. 212 covers the opening 2111 such that the motor housing 211 and the rotor positioning member 212 form a recess 2112. When the motor 21 is energized, the magnetic field within the motor 21 will undergo an orderly change to form a rotating magnetic field such that the axis 213 and the rotor positioning member 212 can drive the motor housing 211 to rotate. Further, when the motor 21 performs the balance test and finds that there is an imbalance phenomenon, a weight 30 can be disposed in the recessed portion 1259321 2112 to perform dynamic balance correction. In the present embodiment, when the rotor positioning member 212 is disposed inside the motor casing 211, the coupling manner is a tight fit. Of course, the bonding manner may also be a glue or a combination. Referring to Figure 4, there is shown a cross-sectional view of a motor of another preferred embodiment of the present invention. The motor 31 according to another preferred embodiment of the present invention mainly includes a motor housing 311, a rotor positioning member 312, and an axis 313. The shaft 313 is vertically disposed on the rotor positioning member 312. The motor housing 311 has an opening 3111 in the direction of the axis 313. The rotor positioning member 312 and the shaft 313 are disposed in the motor housing 311, and the rotor positioning member is disposed. The opening 312 is covered by the opening 312 such that the motor housing 311 and the rotor positioning member 312 form a recess 3112. When the motor 31 is energized, the magnetic field within the motor 31 will undergo an orderly change to form a rotating magnetic field that causes the shaft 313 and the rotor positioning member 312 to rotate the motor housing 311. Further, when the motor 31 performs the balance test and it is found that there is an imbalance phenomenon, a weight 30 may be provided in the recess portion 3112 to perform dynamic balance correction. In the present embodiment, the rotor positioning member 312 is slightly different in shape from the rotor positioning member 212 in the previous preferred embodiment (please refer to FIG. 3), so when the rotor positioning member 312 is disposed inside the motor housing 311, The combination position is also different from that shown in FIG. 3, and the combination thereof is a tight fit. Of course, the combination can also be glued or riveted, which can be determined according to user requirements and production considerations. The following is a preferred embodiment of the color wheel of the present invention. For ease of understanding, the component symbols in the following embodiments are denoted by the same reference numerals as in the previous embodiment. 1259321 Referring to Figure 5, there is shown a cross-sectional view of a color wheel in accordance with a preferred embodiment of the present invention. In the present embodiment, for convenience of explanation, the numbers of the motors are the same as those of the above-described preferred embodiment. The color wheel 2 in accordance with a preferred embodiment of the present invention includes a motor 21 and a color filter 22. The motor 21 mainly includes a motor housing 211, a rotor positioning component 212, and a shaft center 213. The shaft 213 is vertically disposed on the rotor positioning member 212. The motor housing 211 has an opening 2111 in the direction of the shaft 213. The rotor positioning member 212 and the shaft 213 are disposed in the motor housing 211, and the rotor positioning member 212 is covered. The opening 2111 is such that the motor housing 211 and the rotor positioning component 212 form a recess 2112, and the color filter 22 is disposed on the surface 21113 of the motor 21 formed with the recess 2112, so that the color filter 22 is coupled to the rotor. The positioning elements 212 are parallel. When the motor 21 is energized, the shaft center 213 and the rotor positioning member 212 can drive the motor housing 211 and the color filter 22 thereon to rotate. When the color wheel 2 performs the balance test and finds that there is an imbalance phenomenon, a weight 30 can be disposed in the recess portion 2112 to perform dynamic balance correction. In the preferred embodiment, the manner in which the rotor positioning member 212 is coupled to the interior of the motor housing 211 is a tight fit, although it may be glued or riveted. Next, the color filter 22 in this embodiment is an annular color filter, which can form a plurality of blocks of three colors of red, green, blue, or the like by using a plating film on a ring-shaped transparent plate. , green, blue and white transparent blocks; of course, it may also be a circular color filter formed by coating a glass plate of a plurality of fan-shaped blocks, and the ring color filter is The size of the central aperture can be adjusted as needed. 11 1259321 Of course, as shown in FIG. 6 , the color wheel 2 of the embodiment may further include a cover sheet 23 , and the cover sheet 23 is disposed on the color filter 22 such that the color filter 22 is located on the cover sheet 23 and the motor. Between 21 . Thus, the cover sheet 23 can make the combination of the color filter 22 and the motor 21 more compact, or can be used as a positioning reference when the color filter 22 is disposed on the surface 2113 of the motor 21. Referring to Figure 7, there is shown a cross-sectional view of a color wheel of another preferred embodiment of the present invention. The color wheel 3 according to another preferred embodiment of the present invention includes a motor 31 and a color filter 32. The motor 31 includes a motor housing 311, a rotor positioning member 312, and a shaft 313. The shaft 313 is vertically disposed on the rotor positioning member 312. The motor housing 311 has an opening 3111 in the direction of the shaft 313. The rotor positioning member 312 and the shaft 313 are disposed in the motor casing 311, and the rotor positioning member 312 covers the opening 3111, so that the motor casing 311 and the rotor positioning member 312 form a recessed portion 3112, and the color filter 32 is disposed on the motor 31. A surface 3113 of one of the recesses 3112 is formed such that the color filter 32 is parallel to the rotor positioning member 312. When the motor 31 is energized, the shaft 313 and the rotor positioning member 312 can drive the motor housing 311 and the color filter 32 thereon to rotate. When the balance wheel 3 performs a balance test and finds that an imbalance exists, a weight 30 may be disposed in the recess 3112 to perform dynamic balance correction. In the preferred embodiment, the rotor positioning member 312 is inside the motor housing 311. The bonding method is a tight fit, although it can also be glued or riveted. Next, the color filter 32 in this embodiment is an annular color filter, which can form a plurality of blocks of three colors such as red, green, 12 1259321 blue, etc. by using a coating on a ring-shaped transparent plate or Forming red, green, and blue colors and white transparent blocks; of course, it may also be a ring color filter formed by combining glass plates of a plurality of fan-shaped blocks, and the ring color filter is combined. The size of the center aperture of the film can be adjusted as required. Of course, as shown in FIG. 8 , the color wheel 3 of the embodiment may further include a cover sheet 33 , and the cover sheet 33 is disposed on the color filter 32 such that the color filter 32 is located between the cover sheet 33 and the motor 31 . between. Thus, the cover sheet 33 can make the combination of the color filter 32 and the motor 31 more compact, or can be used as a positioning reference when the color filter 32 is disposed on the surface 3113 of the motor 31. Referring to Figure 9, there is shown a cross-sectional view of a color wheel in accordance with still another preferred embodiment of the present invention. A color wheel 4 according to still another preferred embodiment of the present invention includes a motor 41 and a color filter 42. The motor 41 is mainly composed of a motor casing 411 and a shaft center 412. The motor casing 411 is integrally formed and has a recessed portion 4111 in the direction of the axis 412. The recessed portion 4111 has a bottom surface 4112 perpendicular to the axis 412. The shaft center 412 is vertically fixed on one side of the bottom surface 4112 with respect to the motor casing 411, and the color filter 42 is disposed on the surface 4113 of the motor casing 411 on which one of the recessed portions 4111 is formed. When the motor 41 is energized, the shaft center 412 can drive the motor housing 411 and the color filter 42 thereon to rotate. When the color wheel 4 performs the balance test and it is found that there is an imbalance phenomenon, a weight 30 may be disposed in the recess portion 4111 to perform dynamic balance correction. In the preferred embodiment, the color filter 42 is an annular color filter, which can form a plurality of blocks of three colors of red, green, blue, etc. by using a coating film on an annular transparent plate. Red, green, blue and white plus 13 1259321 bright block; of course, it can also be a ring color filter composed of a plurality of sheet-like blocks of glass plates after coating, and the ring color The central aperture size of the filter can be adjusted as needed. Of course, as shown in FIG. 10, the color wheel 4 of the embodiment may further include a cover sheet 43 disposed on the color filter 42 such that the color filter 42 is located between the cover sheet 43 and the motor 41. between. Thus, the cover sheet 43 can make the combination of the color filter 42 and the motor 41 more compact, or can be used as a positioning reference when the color filter 42 is disposed on the surface 4113 of the motor 41. According to the above aspect, the motor casing of the color wheel and the motor thereof according to the present invention has an opening, and the rotor positioning member covers the opening to form a recessed portion of the motor casing and the rotor positioning member, and the recess portion can be used for Dynamic balance correction when turning. When testing an excellent wheel or motor with an unbalanced condition, a weight can be placed in the recess to balance it, thereby reducing the color filter falling off due to unbalance during rotation, eccentric vibration of the color wheel, noise, improper construction Problems such as friction and wear make the color wheel and motor run smoother and extend their service life. Furthermore, since the color wheel of the present invention and the motor thereof do not have a shaft cover, the shape of the color filter may be an annular color filter having an unlimited central aperture; and the color wheel of the present invention The motor has a recessed portion, and in addition to the dynamic balance correction for accommodating the correction weight, the adhesive material can be filled with the adhesive material to increase the adhesion strength between the color filter and the motor casing, and the color filter is reduced when the color wheel rotates. Thereafter, the recessed portion can also accommodate excess glue to prevent the color filter from being contaminated by the overflow. If it is combined with a cover sheet, the combination of the color filter and the motor case can be made more stable, and the cover sheet also has the function of assisting the positioning of the color filter 14 1259321. Therefore, the color wheel of the present invention and its motor can provide a more flexible glass assembling method, a space required for dynamic balance correction, and an extended color wheel and motor life. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a cross-sectional view of a conventional color wheel; FIG. 2 is a schematic view showing a cross-sectional view of a motor in a conventional color wheel; FIG. 3 is a schematic view showing a comparison of the present invention. FIG. 4 is a cross-sectional view showing the motor of another preferred embodiment of the present invention; FIG. 5 is a schematic view showing the cross section of the color wheel of the preferred embodiment of the present invention; Figure 6 is a schematic cross-sectional view showing another color wheel of a preferred embodiment of the present invention; Figure 7 is a schematic view showing a color wheel of another preferred embodiment of the present invention; 1 is a cross-sectional view showing another color wheel of another preferred embodiment of the present invention; FIG. 9 is a schematic cross-sectional view showing a color wheel according to still another preferred embodiment of the present invention; and 15 1259321 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing another color wheel of still another preferred embodiment of the present invention. Symbol description: 1 Color wheel 11 Motor 111 Motor housing 112 Shaft cover 1121 Bearing 113 Positioning plate 1131 Shaft 114 Coil 12 Color filter 13 Cover sheet 2 Color wheel 21 Motor 211 Motor housing 2111 Opening 2112 Sag 砻 P 2113 Surface 212 Rotor positioning element 213 Shaft 22 Color filter 23 Cover sheet 16 1259321 30 Heavy object 3 Color wheel 31 Motor 311 Motor housing 3111 Opening 3112 Recessed part 3113 Surface 312 Rotor positioning element 313 Axis 32 Color filter, light sheet 33 Cover Sheet 4 Color wheel 41 Motor 411 Motor housing 4111 Recessed portion 4112 Bottom surface 4113 Surface 412 Axis 42 Color filter 43 Cover sheet